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Our first carrier the USS Langley, a 13,000 ton converted battleship in 1927, which was it's 7th year in service. Notice the lack of super structure above deck and the lack of side walls on the hangar deck.
Our second carrier, the USS Lexington built in 1927, had the Conning Tower superstructure typical of carriers ever since. But armored hanger deck walls and steel flight decks didn't come until WW II.

Bruce's comment got me looking for pictures of the hangars in modern carriers. And I came upon this one. Does anyone know what the different colored shirts mean in this photo of an "all hands" meeting in a hangar 3 years ago? You've got purple, green, red, blue, and camo. Hi Res picture here.

These statements have not been evaluated by the FDA, EPA, FBI, DEA, CDC, or FDIC. These statements are not intended to diagnose, cause, treat, cure, or prevent any disease. If you feel you have been harmed/offended by, or, disagree with any of the above statements or images, please feel free to fuck right off.

From that link not everyone with the same color shirt has the same duties or area of responsibility, like I figured they would. The colors seem to separate by authority and areas of expertise. The yellow shirt yells, hey blue shirt get away from the bombs and fuel.

These statements have not been evaluated by the FDA, EPA, FBI, DEA, CDC, or FDIC. These statements are not intended to diagnose, cause, treat, cure, or prevent any disease. If you feel you have been harmed/offended by, or, disagree with any of the above statements or images, please feel free to fuck right off.